Fans of Ariana Grande and Britney Spears have gotten into a vicious online argument after Spears threw some (pretty much imaginary) shade at Grande, and neither side seems willing to back down.

The squabble started with Grande, who basically rocks at impersonating other celebs, doing an impression of Spears singing her hit “Baby One More Time” on Saturday Night Live, like, months ago. Apparently, Spears wasn’t even paying attention because she didn’t even seem to know about it.

Until, that is, she appeared for a radio interview with London’s Kiss FM and the DJ played the clip of Grande impersonating her. She actually loved it.